Electrolyte series flow in electrolytic chlor-alkali cells

Details Electrolyte series flow in electrolytic chlor-alkali cells Electrolyte series flow in electrolytic chlor-alkali cells

C - Chemistry, Metallurgy

25

B

204/161, 204/64.

C25B 1/02 (2006.01) C25B 1/16 (2006.01) C25B 1/34 (2006.01) C25B 1/46 (2006.01) C25B 9/00 (2006.01) C25B 15/08 (2006.01)

Patent

CA 1133419

Abstract of the Disclosure In an electrolytic chlor-alkali cell, or bank of cells, having a plurality of electrolyte compartments containing electrode pairs (anodes and cathodes) and wherein a hydraulically-impermeable membrane separates the electrolyte compartments into catholyte portions and anolyte portions, said cell or cells being employed to produce chlorine at the anodes and caustic and hydrogen at the cathodes by electrolysis of an aqueous alkali metal chloride electrolyte, improved operations is attained by sequentially flowing anolyte liquor from anolyte portion to anolyte portion, while simultaneously, flowing catholyte liquor sequentially and in the opposite direction from catholyte portion to catholyte portion. The membrane sub- stantially prevents C1- from entering the catholyte liquor from the anolyte, and a high purity caustic, sub- stantially free of salt, is produced.

331760

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